It's not just Facebook though it's also Visa, Mastercard, Stripe, and PayPal (along with a handful of capital companies I don't recognize right off the bat and

It's not just Facebook though it's also Visa, Mastercard, Stripe, and PayPal (along with a handful of capital companies I don't recognize right off the bat and a couple that are probably large payment providers in their own country I don't recognize, eg Meracdo Pago and PayU). If Bitcoin had come out of the gate with the world's major payment processors already signed on you bet people would have paid way more attention from the start.